An extended gradient-enhanced damage-plasticity model for concrete considering nonlinear creep and failure due to creep

For high stress levels, the dependence of creep strain rate concrete on acting is nonlinear. Furthermore, very levels may lead to a critical growth microcracks resulting in material failure. lifetime assessment sensitive structures by means numerical simulations, realistic description nonlinear crucial. However, many models are formulated for either time-independent behavior, or time-dependent restricted linear creep. This motivation extending damage-plasticity model, aiming at unified and computationally efficient approach representing highly behavior concrete. Well established approaches modeling evolution properties, inelastic deformation, damage, shrinkage serve as basis considering failure due sustained stress. The extended model validated comprehensive experimental results from literature.